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  <title>Fetches the first column of a result set as a string</title>
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  <div id="layout-content"><div id="function.sqlite-fetch-single" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">sqlite_fetch_single</h1>
  <h1 class="refname">SQLiteResult::fetchSingle</h1>
  <h1 class="refname">SQLiteUnbuffered::fetchSingle</h1>
  <p class="verinfo">(PHP 5 &lt; 5.4.0, PECL sqlite &gt;= 1.0.1)</p><p class="refpurpose"><span class="refname">sqlite_fetch_single</span> -- <span class="refname">SQLiteResult::fetchSingle</span> -- <span class="refname">SQLiteUnbuffered::fetchSingle</span> &mdash; <span class="dc-title">Fetches the first column of a result set as a string</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.sqlite-fetch-single-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>sqlite_fetch_single</strong></span>
    ( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
   [, <span class="methodparam"><span class="type">bool</span> <code class="parameter">$decode_binary</code><span class="initializer"> = <strong><code>TRUE</code></strong></span></span>
  ] ) : <span class="type">string</span></div>

  <p class="para rdfs-comment">面向对象风格 (method):</p>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>SQLiteResult::fetchSingle</strong></span>
    ([ <span class="methodparam"><span class="type">bool</span> <code class="parameter">$decode_binary</code><span class="initializer"> = <strong><code>TRUE</code></strong></span></span>
  ] ) : <span class="type">string</span></div>

  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>SQLiteUnbuffered::fetchSingle</strong></span>
    ([ <span class="methodparam"><span class="type">bool</span> <code class="parameter">$decode_binary</code><span class="initializer"> = <strong><code>TRUE</code></strong></span></span>
  ] ) : <span class="type">string</span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>sqlite_fetch_single()</strong></span> is identical to
   <span class="function"><a href="sqlite_fetch_array.html" class="function">sqlite_fetch_array()</a></span> except that it returns the value
   of the first column of the rowset.
  </p>
  <p class="para">
   This is the most optimal way to retrieve data when you are only
   interested in the values from a single column of data.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.sqlite-fetch-single-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<code class="parameter">result</code></dt>

     <dd>

      <p class="para">
       The SQLite result resource.  This parameter is not required when using
       the object-oriented method.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">decode_binary</code></dt>

     <dd>

      <p class="para">当
<code class="parameter">decode_binary</code> 参数设置为 <strong><code>TRUE</code></strong>（默认值）时，PHP 会解码那些由
<span class="function"><a href="sqlite_escape_string.html" class="function">sqlite_escape_string()</a></span>
编码后的二进制数据。通常应保留此值为其默认值，除非要与其他使用 SQLlite 的应用程序建立的数据交互。</p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.sqlite-fetch-single-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the first column value, as a string.
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.sqlite-fetch-single-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2542">
    <p><strong>Example #1 A <span class="function"><strong>sqlite_fetch_single()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><pre><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">if&nbsp;(</span><span style="color: #0000BB">$dbhandle&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">sqlite_open</span><span style="color: #007700">(</span><span style="color: #DD0000">'mysqlitedb'</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0666</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$sqliteerror</span><span style="color: #007700">))&nbsp;{<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$sql&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">"SELECT&nbsp;id&nbsp;FROM&nbsp;sometable&nbsp;WHERE&nbsp;id&nbsp;=&nbsp;42"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$res&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">sqlite_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbhandle</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(</span><span style="color: #0000BB">sqlite_num_rows</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">)&nbsp;&gt;&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">sqlite_fetch_single</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">);&nbsp;</span><span style="color: #FF8000">//&nbsp;42<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #007700">}<br />&nbsp;&nbsp;&nbsp;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">sqlite_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbhandle</span><span style="color: #007700">);<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</pre></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.sqlite-fetch-single-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="sqlite_fetch_array.html" class="function" rel="rdfs-seeAlso">sqlite_fetch_array()</a> - Fetches the next row from a result set as an array</span></li>
   </ul>
  </p>
 </div>

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